The video above shows you how to replace the rear (back) wiper blade in your 2004 Jeep Wrangler. We recommend changing the wiper blades on your Wrangler at least once a year even if you don't use your wipers much - the sun wears out your wiper blades more than using them to wipe water. Another trick to enhance the longevity of your Wrangler's wiper blades is to scrape off the ice and snow from the windshield before using your wipers. A layer of ice is known to have sharp edges that can reduce the effectiveness of the micro edge of the rubber wiper blade.